I am not sure if I am asking a right question but I have Roland V-studio 700r and get the best result during composing a song with heavy samples without clicks and pops if I put the buffer size on 512 and total roundtrip is 26.9 msec. I would like to know how are the others based on their audio interface. So the result will give us some information to choose a good audio device which can come out as a winner in heavy projects.

I know folks have been successful running at 32 samples on smokin machines with heavy hitting projects, so it's the whole ecosystem that has to be considered.  Not a question of just the audio hardware, it's the memory, how much of it, cpu, bus speed, hard drive speed, cache on the hard drive, etc. etc.  
 
Heavy is a vague term as well.  Track counts wouldn't tell the story, nor would numbers of plugins, it's what those plugins are doing, how much memory they are loading up, etc. how the system resources are being utilized.
 
So I may have raised more questions than answered, but just stating some things you should consider when trying to do a comparison.  If you want to do a general system comparison, you can try PassMark.
https://www.passmark.com/baselines/index.php
 
For audio, you'd want to be sure that something like Replendence LatencyMon doesn't flag any drivers as taking too long to process interrupts, etc.
http://www.resplendence.com/latencymon
 
Best,
Keith
 

I have a Roland Quad Capture (ASIO), running on my older i7 Dell Laptop / Win 10 with Sonar Platinum.  I run my interface and record everything in 96k.
 
(512 Buffer)
Input 7.7ms
Output 10.6ms
Roundtrip is 18.2ms
 
I can lower the buffer to 192, and I start getting the occasional dropout. 
 
(192 Buffer)
Input 7.7ms
Output 3.8ms
Roundtrip is 11.5ms
 

Hi. During recording, I use 64 samples (48 kHz). That (IIRC) gives me approx 5.8 ms RTL.
During mixing, I increase it to 2048.
This is with my signature setup below.
All the best.

Hi,
Since I have the same CPU but a less performant chipset, these numbers might be interesting:
Audio Interface: RME AIO
 
Recording mode (32 samples buffer)/ for maximum comfort running guitar vst
Input Latency: 1.7ms, 77 samples
Output latency: 2.5ms, 111 samples
Roundtrip latency: 4.3ms, 188 samples
 
Studio mode (64 samples buffer) / at least 40 tracks with effects
Input latency: 2.5ms, 109 samples
Output latency: 3.2ms, 143 samples
Roundtrip latency: 5.7ms, 252 samples
 
In the past I used an usb-audio interface. I couldn't even dream of a solid performance under 15ms latency. I do not write down the brand, because it gives a wrong impression. It is a fine piece of hw.
But these pci-cards rock! Since than I can comfortably use TH3 and it feels like the amp next to the machine. And I had no dropouts since than, which ruins at least half a dozend recordings of me...

davec69
I have a Roland Quad Capture (ASIO), running on my older i7 Dell Laptop / Win 10 with Sonar Platinum.  I run my interface and record everything in 96k.
 
(512 Buffer)
Input 7.7ms
Output 10.6ms
Roundtrip is 18.2ms
 
I can lower the buffer to 192, and I start getting the occasional dropout. 
 
(192 Buffer)
Input 7.7ms
Output 3.8ms
Roundtrip is 11.5ms
 

So, I am running on 4 years old I7 CPU with 24GB RAM. Almost same spec but yours is 8.7 msec less. Does the Quad Capture has the official windows 10 driver?

I generally work to a round trip of approx 9.2 milliseconds.

Depending on how many and which plugins are loaded I can get that down to a stable 4ms or thereabouts, but since saving those 5ms offers me no advantage I can spot I don't generally bother. I'm happy with 10ms or less round trip when monitoring through the DAW.

RME UFX by the way.

reza

davec69
I have a Roland Quad Capture (ASIO), running on my older i7 Dell Laptop / Win 10 with Sonar Platinum.  I run my interface and record everything in 96k.
 
(512 Buffer)
Input 7.7ms
Output 10.6ms
Roundtrip is 18.2ms
 
I can lower the buffer to 192, and I start getting the occasional dropout. 
 
(192 Buffer)
Input 7.7ms
Output 3.8ms
Roundtrip is 11.5ms
 

So, I am running on 4 years old I7 CPU with 24GB RAM. Almost same spec but yours is 8.7 msec less. Does the Quad Capture has the official windows 10 driver?

I'm using Quad Capture v1.52 Driver.  I do have an uninstaller in "Programs & Features", so I don't think it's the official windows 10 installed driver.  It's probably the Win7/8 driver available on the Roland website here:
 
https://www.roland.com/us/support/by_product/quad-capture/updates_drivers/
 
 

Ok, maybe we should narrow down the subject. Let's say what is the Total Roundtrip in audio sample buffer of 32 and 512 with different Audio Devices.

The audio interface is far from the most critical piece of the puzzle. As Keith says above, you have to consider the entire ecosystem. If the best you can get now is 26 ms, so you then go out and buy a premium interface, you might be able to chop 2 ms off that figure. You have to ask yourself if that's worth $1-2K or more.
 
BTW, my buffers stay at 2048 and I almost never change them.